1020. That these things are meant becomes clear from the fact that everything put together as history from Genesis 1 down to Eber in Chapter 11 means something different from what appears in the letter, and from the consideration that the historical narratives there are purely made-up history customary among the most ancient people. When attesting the truth of some matter they would say that 'Jehovah said it'. Here however 'God' is used because the subject is the spiritual Church. And they did the same when anything true was being, or had been, put into effect.
Upper
In Exodus 12:7, the upper door post signifies almost the same thing as the forehead with a man, i.e., the goods of love, here in the natural man. (Arcana Coelestia 7847)
Upper, in general, signifies the higher or highest degrees of the mind or spirit, and its particular significance depends on the accompanying words. (Conjugial Love 270[5];, Arcana Coelestia 4599)